Electrical breaker wire size chart

Here is a wire size chart for electrical breakers:

Breaker Size Chart

Notes:

• AWG (American Wire Gauge) is a standard unit of measurement for wire size.
• mm² is the metric equivalent of AWG.
• The wire size chart is based on the National Electric Code (NEC) and is intended for use in the United States.
• The wire size required for a breaker is determined by the breaker's amp rating and the distance the wire will be run.
• It's always a good idea to consult the manufacturer's instructions for specific wire size recommendations for your breaker and electrical system.

Wire Size Calculation:

To calculate the wire size required for a breaker, you can use the following formula:

Wire Size (AWG) = (Breaker Amp Rating x Distance in Feet) / 0.03

For example, if you have a 30A breaker and you need to run the wire 100 feet, the wire size would be:

Wire Size (AWG) = (30A x 100 ft) / 0.03 = 10 AWG

This means you would need to use a 10 AWG wire for the 30A breaker.

Remember to always follow the manufacturer's instructions and local electrical codes when selecting wire size for your electrical system.